Seems like I'm going to have to keep my eye out for one of these. I also asked about the early 35 Summilux, and it seems to have more issues (or at least more critics), plus it's about twice as expensive.
I don't know what it is, but the bokeh & overall signature most of the CV lenses just doesn't work for me. It could all just be in my head, but I still have to deal with it. Otherwise, I would just get the 40/1.4 and tap dance through life. Plus, I feel that the 1.7 is closer to f/2 than 1.4 and the f/1.2 is freaking monstrous. This is going to be my main lens. I mean, I could live with that size for a Noctilux, but I'm not in love with the Cosina enough to lug it around every night.
And re: R-D1/Canon focus issues: My 50/1.5 has behaved alright so far, but the focusing error could just be counteracting my own bad focusing lol.